Here's an idea for the community blog that could help to grow the audience, and draw attention to the site. 
A monthly UX angel service, with some kind of superhero theme.

 
 - Choose a product (web site, software, smart phone, lava lamp, pen, car, space ship, etc)
 - Do a UX review of the product (either focussed on a specific feature, or more broad)
 - Make recommendations for improvements
 - Do re-designs of certain components
 - Write it all up in a beautiful blog post

Each article would probably require 4-5 UX'ers to participate. And there would need to be a style guide and/or writing guide to maintain consistency.
The value to the recipient of this review could be estimated at $1-5k, so being selected could become some kind of competition, which offers opportunities to draw attention to the site and grow the community.  

This would be a lot of work! but would be really cool.